Overall (n = 74)

Younger group (n = 42)

Elderly group (n = 32)

No. of patients

(%)

No. of patients

(%)

No. of patients

(%)

p value

Age

Mean

65.7 ± 5.1

58.9 ± 8.2

74.8 ± 3.3

<0.0001

range

35 - 84

35 - 69

70 - 84

Gender

Male

54

73

27

64.3

27

84.4

0.0542

Female

20

27

15

35.7

5

15.6

ECOG-PS

0

64

86.5

40

95.2

24

75

0.0083

1

9

12.2

1

2.4

8

25

2

1

1.4

1

2.4

Surgery

Lobectomy

66

89.2

38

90.4

28

87.5

0.1522

Pneumonectomy

3

4.1

2

4.8

1

3.1

Partial resection

2

2.7

2

4.8

None

3

4.1

3

9.4

Histology

Adenocarcinoma

64

86.5

39

92.8

25

78.1

0.1737

Squamous cell carcinoma

7

9.5

2

4.8

5

15.6

Adenosquamous cell carcinoma

3

4.1

1

2.4

2

6.3

Clinical stage

IB

2

2.7

2

4.8

0.0398

IIA

9

12.2

6

14.3

3

9.4

IIB

6

8.1

1

2.4

5

15.6

IIIA

25

33.8

16

38

9

28.1

IIIB

8

10.8

7

16.7

1

3.1

IV

24

32.4

10

23.8

14

43.8